Observation of the Dalitz decay of the first excited state of the charmed-strange meson
by Das, Souvik, Ph.D., CORNELL UNIVERSITY, 2011, 300 pages; 3484858

Abstract:

The branching fraction for a previously unobserved decay [special characters omitted]e+e– is predicted theoretically in this dissertation to be 0.65% of the branching fraction for the decay [special characters omitted]γ. We conduct a search for the [special characters omitted]e+e– in 586 pb–1 of e+ e– collision data collected with the CLEO-c detector at the Cornell Electron Storage Ring (CESR) operating at a center of mass energy of 4170 MeV and observe it with a significance of 6.4 σ over estimated backgrounds. The ratio of branching fractions B([special characters omitted]e+e– )/B([special characters omitted]γ) is measured to be (0.72 ± 0.14(stat) ± 0.06(syst))%, which is within one standard deviation of uncertainty from the predicted value.

 
AdviserAnders Ryd
SchoolCORNELL UNIVERSITY
SourceDAI/B 73-02, p. , Dec 2011
Source TypeDissertation
SubjectsNuclear physics; Particle physics
Publication Number3484858
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